Will it be a barrier if haven't salary slip system through working in a private company for the Territorial Army exam?

I hav applied for territorial army exam n also got call letter for written exam...bt problem is that in callup letter they ask about some documet like ,salary slip income certificate,medical `certificate,noc....and more but my problem is that i m working in private company from last two years but getting my salary cash.and not getting salary slip......does it create problem for me???????plz guide me.